School of Environmental and Forest Sciences, University of Washington , Seattle, Washington 9819.
Herbarium, Bereich Geobotanik und Botanischer Garten, Institut für Biologie , Martin-Luther-Universität, Neuwerk 21, 06099 Halle (Saale), Germany.
Mycologia. 2020 May-Jun;112(3):616-632. doi: 10.1080/00275514.2020.1739508. Epub 2020 May 6.
The phylogeny and taxonomy of powdery mildew on species is evaluated and discussed. Morphological and phylogenetic analyses revealed two new species and demonstrated that and should be reduced to synonymy and are referred to herein as . The two new species, and , previously hidden under (including ), is described on the basis of European, North American, and East Asian powdery mildew collections on var. , and . The sexual morph of is similar to that of ; however, morphological differences exist in their asexual morphs. Analyses of sequences from the internal transcribed spacer (ITS) and 28S genomic regions of species obtained on species (and other closely allied species) throughout the world reveled that and are in two different monophyletic groups that are separate from all other species. and on species have often been recognized as separate species based on morphological differences in the size of their chasmothecia and the number of chasmothecial appendages. Taxonomic conclusions based on these morphological distinctions within these species are unreliable (these characters are rather variable and often have overlapping ranges). The present phylogenetic analyses suggest that has to be reduced to synonymy with . To fix the application of the species names and , epitypes have been designated for these taxa with ex-epitype sequences. Additionally, the Asian species is phylogenetically confirmed as a species of its own, described in detail and discussed.
评价和讨论了物种上粉霉的系统发育和分类学。形态学和系统发育分析揭示了两个新种，并表明和应被归并为同义词，在此称为。这两个新种，和，以前隐藏在（包括）下，是根据欧洲、北美和东亚的物种上的粉霉属收集物描述的，和。的有性形态与相似；然而，它们的无性形态存在形态差异。对来自世界各地物种（和其他密切相关的物种）上的种内转录间隔区（ITS）和 28S 基因组区域的序列进行分析表明，和在两个不同的单系群中，与所有其他物种分开。物种上的和通常被认为是不同的物种，基于它们的腔壳大小和腔壳附属物的数量的形态差异。基于这些形态差异的分类学结论是不可靠的（这些特征变化较大，范围往往重叠）。目前的系统发育分析表明，必须与归并为同义词。为了解决这些物种名称和的应用问题，已为这些分类群指定了副模式标本，并提供了副模式标本序列。此外，亚洲种被确认为一个独立的种，对其进行了详细描述和讨论。
